f498800a93517bbbf49538e3a96713fa6c1a65ce415250ddfc865cd97690d158

Analysis

max time kernel
156s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2024, 03:40

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General

Target

2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe
Size

40KB
MD5

723e57db18ea81f2501a96496050cf94
SHA1

86e9b7309b4bb4a4be8a7319f5aa0956e6ba06c4
SHA256

f498800a93517bbbf49538e3a96713fa6c1a65ce415250ddfc865cd97690d158
SHA512

cc3be1ded19f4b8fd0f5e30dcc1c8cf2f8317e1ad74bd2d2336aa3950fab3114f2e41fc74ebaa34b9c95c92ded3b28a6827daf96d9a694073ef8c71a3c36485f
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA6:b/pYayGig5HjS3NPA6

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000002312f-13.dat	CryptoLocker_rule2

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3992	retln.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1368 wrote to memory of 3992	1368	2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe	84
PID 1368 wrote to memory of 3992	1368	2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe	84
PID 1368 wrote to memory of 3992	1368	2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_723e57db18ea81f2501a96496050cf94_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1368
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:3992

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
40KB

MD5
fa967416d6d1d426357e39e33d172a10

SHA1
c4be8604ddf9f8b21794ee1b644a78a1fb2bcf1d

SHA256
0c97f855d0e70167620f5a3c67b04559e40f401e3baee87f532cdf4d3ea09198

SHA512
5687d3b3321bf5984773ff1f10546f6dc9784e043244e295532cd69a9db5952a3dc879b836e639643303673ad12ab9e6afda4fbf124e0d010877c369afd04fdf

Download Submit
memory/1368-0-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/1368-1-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/1368-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3992-21-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download